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參數(shù)資料
| 型號： | MSM7662 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | NTSC/PAL Digital Video Decoder(NTSC/PAL制式數(shù)字視頻譯碼器) |
| 中文描述： | NTSC / PAL數(shù)字視頻解碼器（的NTSC / PAL制式數(shù)字視頻譯碼器） |
| 文件頁數(shù)： | 11/48頁 |
| 文件大?。?/td> | 369K |
| 代理商： | MSM7662 |
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Semiconductor
MSM7662
11/47
FUNCTIONAL DESCRIPTION
Analog Unit
1) Analog input select: Compatible with composite video signals and S-video signals. Input
selection can be switched by register control via the I
2
C-bus or by
external pins. (See the below chart for pin combinations.)
2) Clamp function:
An analog clamp and a digital pulse clamp can be used.
Analog clamp (HSY = 1)*
Analog clamp
HSY clamp (digital clamp)
HSY clamp (digital clamp)
Only the HSY clamp can be set as the pedestal clamp.
3) AGC amp:
The AGC function operates depending upon the input level.
Manual gain setting is also possible. This AGC function operates at 2
stages, the analog unit and digital unit. Digital decoded data is output
in conformance with ITU-RBT.601.
4) A/D converter:
Two internal 8-bit A/D converters sample at twice the pixel frequency.
(Sampling at the pixel frequency is possible by changing the register
setting.)
List of Analog Input Conditions
Input Signal
@Control Pin
INS[2:0]
[000]
[001]
[010]
[011]
[100]
[101]
[110]
[111]
Input Pin
VIN3
ADC Selection
ON
ON
ON
ON
ON
ON
ON
ON
OFF
VIN1
Composite
VIN2
VIN4
VIN5
VIN6
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
Composite Input*
Composite Input
Composite Input
Composite Input
Composite Input
S-video Input
S-video Input
All inputs Off
Composite
Composite
Composite
Composite
Chroma
Luminance
Luminance
Chroma
OFF (Sleep)
Blank spaces: non-selectable
@: These pin settings are valid during external mode setting. In the internal register mode, the
register contents will be changed.
*: register default setting after LSI reset
Manual Gain Control (analog AMP gain)
Gain Setting Pins
GAINS[2:0]
[000]
[001]
[010]
[011]
[100]
[101]
[110]
[111]
Set Gain Value
Typ. Value (multiplication factor)
1.0
1.35
1.75
2.3
3.0
3.8
5.0
2.0
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